Optical illusions are older than you think. The first optical illusions date back to 20,000 BC and took the form of cave sculptings. Nowadays they are found all over the place – on screens, in books ...

An optical illusion that claims to reveal your personality type has infiltrated TikTok, causing a mixed response among users. The odd image presents as either a vine of grapes or a clump of gummy ...

Illusions like these mess with the brain's visual processing system, making viewers see things that aren't there in reality. | Credit: Eva Almqvist via Getty Images Optical illusions play tricks on ...

Optical illusions trick the eye and brain into seeing what a person sees at first glance, despite many objects hidden in the ...

While new optical illusions go viral all the time, here are some of the most famous illusions that have kept us scratching our heads for years.

The optical illusion seen above makes the viewer feel as if they are falling into an expanding hole – and now we have a good explanation for why this happens. To investigate whether the expanding hole ...

Optical illusions aren’t just playful tricks. They often hint at how your brain works beneath the surface. Take this puzzle, for instance. It is one of the most amusing optical illusions in psychology ...

If you have never seen an optical illusion, it is an image that makes you see things differently than they actually are. Optical illusions trick your eyes into believing you see something that is not ...

In this Ebbinghaus illusion of relative size perception, the orange circle on the left looks bigger than the one on the right - but it is actually 10 per cent smaller. In a new study, medical imaging ...